Part number 550-141-887/0800
28
AHE
Series 4 Direct Vent Wall-Mounted Boilers
— Boiler Manual
11b
Service and maintenance — annual start-up
o
Inspect
Boiler heating surfaces
1.
Turn off power to the boiler following “To Turn
Off Gas To The Appliance” instructions found in
the Operating Instructions on pages 24 and 25. Do
not drain the system unless exposure to freezing
temperatures will occur. If antifreeze is used with
system, do not drain.
2.
Remove cleanout plate “B”. See Figure 19.
3.
If the interior shows evidence of soot, follow
“Cleaning boiler heating surfaces” on page 29 to
remove the blower assembly and clean the boiler if
necessary after close inspection of the boiler heating
surfaces. If there is evidence of rusty scale deposits,
check the water piping and control system to make
sure the boiler return water temperature is properly
maintained (per this manual).
4.
Replace all boiler components before returning to
service.
5.
Check inside and around boiler for evidence of any
leaks from the boiler. If found, locate source of leaks
and repair.
Figure 19
Burners and base
1.
After turning off power to the boiler, remove cover
plate “A”. See Figure 19.
2.
Unplug ignitor before removing. Carefully remove
ignitor (see Figure 20) and ignitor gasket. Use
caution — ignitor is brittle and can break. Do not
touch ignitor surface with bare hands, Body oils
can cause failure of the carbide. Replace ignitor
gasket if original gasket is frayed or damaged.
Wait several minutes until ignitor
cools down before removing. Failure
to do so will cause severe personal
injury.
3.
Inspect burners and all other components in the
boiler base.
4.
If burners must be cleaned, remove burners and
vacuum or brush burners to remove dust and lint.
a.
Remove wires from rollout thermal fuse
element. (Figure 30, item 7, page 42.)
b.
Remove burner plenum cover. (Figure 30, item
9, page 42.)
c.
Pull off burner clips
d.
Remove main burners.
5.
Inspect the base insulation. Pay attention to the
WARNING
on page 48 regarding working with
insulation materials. The combustion chamber is
lined with high temperature refractory material.
Check to make sure the base insulation is secure
against three sides of the base. If refractory material
is damaged or displaced, do not operate boiler.
6.
Replace burners, ignitor gasket and ignitor.
When replacing burners, burner
tubes must be seated in their slots
in the back with the openings face
up. Front of burner tubes must rest
fully over main burner orifices. Main
burner orifices must inject down
center of burner. Failure to do so will
cause severe personal injury, death
or substantial property damage.
Figure 20
Ignitor
88716
Summary of Contents for AHE Series
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